1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation,
turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 19), and then remove the following components:
a. Remove the battery (see Battery on page 21).
b. Remove the fan (see Fan on page 25).
c. Remove the system board (see System board on page 30).
Remove the keyboard:
1. Remove the 55 Phillips PM1.1×1.5 screws that secure the keyboard to the top cover from the locations
in the following illustration.
2. Remove the keyboard shields (1).
Keyboard 35